Support large monocultures of single species crops may be one of the factors driving the decline ok years talking about patents of change and i understand thats thats basically how youre managing to quantify the decrease in population is very difficult to count birds as they are constantly moving can you explain that sure so this study uses. Counts surveys of birds performed during the breeding season so this is the period of the year when the bird populations are most stable theyre tied to their breeding grounds at that point and so its the best time of year to count their populations we can have the most confidence in our counts right and what is the wider impact of the said disappearing birds disappearing bird population on the ecosystem as a whole. Yeah well birds play major roles in the ecosystems both as consumers of prey and insects and as prey for other predators they also are pollinators and disperses of seeds. So their role in the ecosystem is essential to the stability of ot